<template>
  <view>
    <my-search @click="gotoSearch"></my-search>
    
    <view class="scroll-view-container">
      <scroll-view class="left-scroll-view" scroll-y="ture" :style="{height: wh + 'px'}">
        <block v-for="(item, i) in cateList" :key="i">
          <view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChanged(i)">
            {{item.cat_name}}
          </view>
        </block>
      </scroll-view>
      
      <!-- 右侧的滚动视图区域 -->
      <scroll-view class="right-scroll-view" scroll-y :style="{height: wh + 'px'}" :scroll-top="scrollTop">
        <view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
          <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
          <!-- 动态渲染三级分类的列表数据 -->
          <view class="cate-lv3-list">
            <!-- 三级分类 Item 项 -->
            <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
              <!-- 图片 -->
              <image :src="item3.cat_icon.replace('api-ugo-dev','api-ugo-web')"  mode="widthFix"/>
              <!-- 文本 -->
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
        </view>
      </scroll-view>

    </view>
  </view>
</template>

<script>
import { getCateList } from '../../api/cate';
  export default {
    data() {
      return {
        wh: 0,
        cateList: [],
        active: 0,
        cateLevel2:[],
        scrollTop: 0
      };
    },
    onLoad(){
      const sysInfo = uni.getSystemInfoSync()
      // console.log(sysInfo);
      this.wh = sysInfo.windowHeight - 50
      this.getCateList()
    },
    methods:{
      async getCateList(){
        const {data:res} = await getCateList()
        console.log(res);
        if(res.meta.status !== 200) return uni.$showMsg()
        this.cateList = res.message[0].children
        console.log(this.cateList[0].children);
      },
      activeChanged(i){
        this.active = i
        this.cateLevel2 = this.cateList[i].children
        
        this.scrollTop = this.scrollTop === 0?1:0
      },
      gotoGoodsList(item3){
        uni.navigateTo({
          url: '/subpkg/goods_list/goods_lsit?cid=' + item3.cat_id
        })  
      },
      gotoSearch(){
        uni.navigateTo({
          url: '/subpkg/search/search'
        })
      }
    }
  }
</script>

<style lang="scss">
.scroll-view-container{
  display: flex;
  .left-scroll-view{
    width: 120px;
  }
  .left-scroll-view-item{
    text-align: center;
    font-size: 12px;
    line-height: 60px;
    background-color: #f7f7f7;
    
    &.active{
      background-color: #ffffff;
      position: relative;
      
      &::before{
        content: '';
        display: block;
        width: 3px;
        height: 30px;
        background-color: #c00000;
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
      }
    }
  }
  .cate-lv2-title{
    font-size: 12px;
    font-weight: bold;
    text-align: center;
    padding: 12px 0;
  }
  .cate-lv3-list{
    display: flex;
    flex-wrap: wrap;
    
    .cate-lv3-item{
      width: 33.33%;
      margin-bottom: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      
      image{
        width: 60px;
        height: 60px;
      }
      
      text{
        font-size: 12px
      }
    }
  }
}
</style>
